phantom circuit noun

(as in telecommunications) an additional circuit which does not in fact exist, the extra performance being obtained by suitable arrangements of real circuits

phantom limb noun

The sensation experienced by an amputee of the amputated limb still being attached to the body

phantom material noun (radiology)

Material producing absorption and backscatter of radiation similar to human tissue, hence used to study radiation doses, etc (also called tissue equivalent material)

phantom pain noun

A sensation of pain in a phantom limb

phantom pregnancy noun

False pregnancy (qv)

phantom withdrawal noun (informal; finance)

The apparently unauthorized and unexplained removal of money from bank accounts through automated teller machines